CN111974922A - Automatic extrusion device for aluminum tubes - Google Patents

Abstract

The invention relates to an automatic extrusion forming device for aluminum tubes, which comprises a base, a support rod, a cross rod, an operating platform, an air cylinder, a stamping head and a feeding mechanism, wherein the operating platform is arranged on the base, the air cylinder is vertically downwards arranged on the cross rod, the stamping head is arranged on the air cylinder, the feeding mechanism is arranged on one side of the operating platform, the feeding mechanism comprises a driving component, a driven component, a limiting component and a pushing component, the automatic extrusion forming device for the aluminum tubes realizes automatic feeding through the feeding mechanism, the stamping head is driven by the air cylinder to realize extrusion forming on aluminum blocks in a cylindrical groove, compared with the existing extrusion forming device, the device realizes feeding, forming of workpieces and recovery of finished products simultaneously through one output source, saves energy, compared with the existing feeding mechanism, the feeding mechanism is matched with a first clamping rod and a second clamping rod, realize dropping in proper order and the propelling movement of aluminium pig, avoid aluminium pig card in pan feeding pipe department, realize better pay-off effect.

Description

Automatic extrusion device for aluminum tubes

Technical Field

The invention relates to an automatic extrusion forming device for an aluminum pipe.

Background

The extrusion forming is a processing method of blank, the processing course is that the blank is extruded from the orifice or gap of the mould under the action of three-dimensional uneven compressive stress to reduce the cross-sectional area and increase the length, so as to form the required product, the extrusion, especially the cold extrusion, has high material utilization rate, improved material structure and mechanical property, simple operation and high production rate, can be used for manufacturing long-rod, deep-hole, thin-wall and special-shaped section parts, and is an important few-cutting-free processing technology.

The aluminum pipe extrusion forming device is a device for extruding an aluminum block and then forming the aluminum pipe, when the existing small aluminum pipe extrusion forming device is used, the aluminum block is generally pushed into a grinding tool manually, a workpiece is taken down after forming, the operation is dangerous, a stamping head is pressed to the hand of an operator to cause industrial injury, the existing automatic extrusion forming device needs a plurality of output ends to stamp, push materials and the like respectively, and energy consumption is high.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the automatic extrusion forming device for the aluminum pipe is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: an automatic extrusion forming device for aluminum tubes comprises a base, a supporting rod, a cross rod, an operating platform, an air cylinder, a stamping head and a feeding mechanism, wherein the cross rod is arranged above the base through the supporting rod, the operating platform is arranged on the base, a cylindrical groove is formed in the operating platform, the air cylinder is vertically arranged on the cross rod downwards, the stamping head is installed on the air cylinder, the stamping head is cylindrical, the stamping head and the cylindrical groove are coaxially arranged, the feeding mechanism is arranged on one side of the operating platform, and the feeding mechanism comprises a driving assembly, a driven assembly, a limiting assembly and a pushing assembly;

the driving assembly comprises a connecting rod, a first rack, a rotating shaft and a rotating gear, the connecting rod is arranged on an air rod of the air cylinder, the first rack is arranged on one side of the stamping head, the first rack is parallel to the air rod of the air cylinder, the rotating shaft is arranged above the operating table, the rotating gear is sleeved on the rotating shaft, the rotating gear is in key connection with the rotating shaft, and the rotating gear is meshed with the first rack;

the driven assembly comprises a moving unit and a positioning unit, the moving unit comprises a half gear, a second rack and a moving rod, the half gear is sleeved on the rotating shaft and is in key connection with the rotating shaft, two moving rods are arranged on two sides of the half gear respectively, two second racks are arranged on the two moving rods respectively, the half gear is meshed with one of the second racks, the two positioning units are arranged corresponding to the two moving rods and comprise positioning rods and springs, the positioning rods penetrate through the movable rods, the operating platform is provided with two fixing rods, the two fixing rods are respectively arranged at the two ends of the movable rods, the spring is sleeved on the positioning rod, one end of the spring is connected with the fixing rod, and the other end of the spring is connected with the movable rod;

the limiting assembly comprises a feeding pipe, a first clamping rod and a second clamping rod, the feeding pipe is arranged on the operating platform, the feeding pipe is located between the cylindrical groove and the moving rod, a first bayonet and a second bayonet are arranged on the feeding pipe, the first bayonet and the second bayonet are respectively arranged on two sides of the feeding pipe, the first bayonet is located below the second bayonet, the first clamping rod and the second clamping rod are both arranged on one moving rod far away from the operating platform, the first clamping rod and the second clamping rod are respectively located at two ends of the moving rod, the first clamping rod and the second clamping rod are respectively arranged corresponding to the first bayonet and the second bayonet, the first clamping rod extends into the first bayonet and abuts against the inner wall of the feeding pipe, and the second clamping rod is located at the bayonet of the second bayonet;

the pushing assembly comprises two wedge blocks and two baffle plates, the wedge blocks are arranged on a moving rod close to the operating platform, the two baffle plates are arranged on the operating platform and are respectively arranged on two sides of the cylindrical groove, the wedge blocks are arranged between the two baffle plates, a discharge hole is formed in the bottom of the feeding pipe, and the wedge blocks are arranged at the discharge hole.

In order to take down the formed workpiece, a lantern ring is arranged on the stamping head and fixed on the operating platform, and the lantern ring is connected with the stamping head in a sliding mode.

In order to push out the formed workpiece, a push rod is arranged on the lantern ring, one end of the push rod is hinged to the lantern ring, the other end of the push rod is abutted to the stamping head, and a torsion spring is arranged at the hinged position of the push rod and the lantern ring.

In order to reduce friction, a roller is arranged at the position where the push rod abuts against the stamping head.

In order to make the moving rod return to the initial position better, the number of the springs is two, and the two springs are respectively arranged on two sides of the moving rod.

In order to allow the punch head to be inserted into the cylindrical groove, the diameter of the punch head is smaller than that of the cylindrical groove.

In order to enable the first clamping rod and the second clamping rod to be clamped into the feeding pipe better, chamfers are arranged on the first clamping rod and the second clamping rod.

In order to enable the first clamping rod to be completely moved out of the feeding pipe, the moving distance of the first clamping rod is larger than the diameter of the feeding pipe.

In order to avoid collision between the second clamping rod and the feeding pipe, the length of the second clamping rod is not larger than the diameter of the feeding pipe.

For better ejection of the formed workpiece, the stamping head is coated with a lubricating oil.

The automatic extrusion molding device for the aluminum pipe has the advantages that automatic feeding is achieved through the feeding mechanism, extrusion molding of the aluminum blocks in the cylindrical grooves is achieved through the cylinder driving the stamping head, compared with the existing extrusion molding device, feeding, workpiece molding and finished product recycling are achieved through the device through one output source, energy is saved, compared with the existing feeding mechanism, the feeding mechanism achieves sequential falling and pushing of the aluminum blocks through mutual matching of the first clamping rod and the second clamping rod, the aluminum blocks are prevented from being clamped at the position of the feeding pipe, and a better feeding effect is achieved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view showing the construction of an automatic extrusion molding apparatus for aluminum pipes according to the present invention;

FIG. 2 is a schematic view showing the construction of a driven assembly of the automatic aluminum pipe extruding apparatus of the present invention;

FIG. 3 is a schematic structural view of a stopper assembly of the automatic aluminum pipe extrusion molding apparatus of the present invention;

FIG. 4 is a schematic view showing a coupling structure of a moving unit and a stopper assembly of the automatic aluminum pipe extruding apparatus of the present invention;

FIG. 5 is a schematic view showing the construction of a push-out assembly of the automatic aluminum pipe extruding apparatus of the present invention;

in the figure: 1. the automatic feeding device comprises a base, 2 parts of supporting rods, 3 parts of cross rods, 4 parts of an operating platform, 5 parts of air cylinders, 6 parts of stamping heads, 7 parts of connecting rods, 8 parts of first racks, 9 parts of rotating shafts, 10 parts of rotating gears, 11 parts of half gears, 12 parts of second racks, 13 parts of moving rods, 14 parts of positioning rods, 15 parts of springs, 16 parts of fixing rods, 17 parts of feeding pipes, 18 parts of first clamping rods, 19 parts of second clamping rods, 20 parts of wedge blocks, 21 parts of baffles, 22 parts of collars, 23 parts of push rods and 24 parts of idler wheels.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, the automatic extrusion forming device for the aluminum tube comprises a base 1, a support rod 2, a cross rod 3, an operating platform 4, a cylinder 5, a stamping head 6 and a feeding mechanism, wherein the cross rod 3 is arranged above the base 1 through the support rod 2, the operating platform 4 is arranged on the base 1, a cylindrical groove is formed in the operating platform 4, the cylinder 5 is vertically arranged on the cross rod 3 downwards, the stamping head 6 is arranged on the cylinder 5, the stamping head 6 is cylindrical, the stamping head 6 and the cylindrical groove are coaxially arranged, the feeding mechanism is arranged on one side of the operating platform 4, and the feeding mechanism comprises a driving assembly, a driven assembly, a limiting assembly and a pushing assembly;

pack into pan feeding pipe 17 with cylindricality aluminium pig in, when needs carry out extrusion, will move cylinder 5, the gas pole extension of cylinder 5, drive punching press head 6 removes, thereby make punching press head 6 extrude the cylindricality aluminium pig in the cylindrical recess, thereby make aluminium pig extrusion, make into the aluminum pipe, when cylinder 5 moves, drive assembly moves, drive assembly drive driven assembly moves, driven assembly drive spacing subassembly moves, thereby make the aluminium pig fall in pan feeding pipe 17 bottom, then push the aluminium pig to the cylindrical recess through pushing out the subassembly, realize the shaping.

In order to allow the punch head 6 to be inserted into the cylindrical groove, the diameter of the punch head 6 is smaller than the diameter of the cylindrical groove.

As shown in fig. 1, the driving assembly includes a connecting rod 7, a first rack 8, a rotating shaft 9 and a rotating gear 10, the connecting rod 7 is disposed on the air rod of the air cylinder 5, the first rack 8 is disposed on one side of the stamping head 6, the first rack 8 is parallel to the air rod of the air cylinder 5, the rotating shaft 9 is disposed above the operating table 4, the rotating gear 10 is sleeved on the rotating shaft 9, the rotating gear 10 is connected with the rotating shaft 9 in a key manner, and the rotating gear 10 is meshed with the first rack 8;

the air rod of the air cylinder 5 drives the connecting rod 7 to move, the connecting rod 7 drives the first rack 8 to move, the first rack 8 drives the rotating gear 10 to rotate, and the rotating gear 10 drives the rotating shaft 9 to rotate.

As shown in fig. 2, the driven assembly includes a moving unit and two positioning units, the moving unit includes a half gear 11, a second rack 12 and two moving rods 13, the half gear 11 is sleeved on the rotating shaft 9, the half gear 11 is connected with the rotating shaft 9, there are two moving rods 13, the two moving rods 13 are respectively disposed at two sides of the half gear 11, there are two second racks 12, the two second racks 12 are respectively disposed on the two moving rods 13, the half gear 11 is engaged with one of the second racks 12, there are two positioning units, the two positioning units are disposed corresponding to the two moving rods 13, the positioning unit includes a positioning rod 14 and a spring 15, the positioning rod 14 passes through the moving rods 13, a fixing rod 16 is disposed on the operating platform 4, there are two fixing rods 16, the two fixing rods 16 are respectively disposed at two ends of the moving rods 13, the spring 15 is sleeved on the positioning rod 14, one end of the spring 15 is connected with the fixed rod 16, and the other end of the spring 15 is connected with the movable rod 13;

the rotating shaft 9 drives the half gear 11 to rotate, when the half gear 11 is meshed with the second rack 12, the half gear 11 drives the second rack 12 to move, and the second rack 12 drives the moving rod 13 to move.

Here, the positioning rod 14 passes through the moving rod 13, so that the moving rod 13 can move only in the axial direction of the positioning rod 14, thereby limiting the movement of the moving rod 13.

The movement of the moving rod 13 drives the spring 15 in the moving direction of the moving rod 13 to be compressed, the restoring force of the spring 15 generates pushing force on the moving rod 13, the other spring 15 is stretched, the restoring force of the other spring 15 also generates pulling force on the moving rod 13, and when the half gear 11 leaves the second rack 12, the moving rod 13 is driven to return to the initial position under the restoring force of the two springs 15.

In order to return the moving rod 13 to the initial position better, there are two springs 15, and the two springs 15 are respectively disposed at both sides of the moving rod 13.

As shown in fig. 3-4, the limiting assembly comprises a feeding pipe 17, a first clamping rod 18 and a second clamping rod 19, the feeding pipe 17 is arranged on the operating platform 4, the feeding pipe 17 is positioned between the cylindrical groove and the moving rod 13, the feeding pipe 17 is provided with a first bayonet and a second bayonet which are respectively arranged at two sides of the feeding pipe 17, the first bayonet is positioned below the second bayonet, the first clamping rod 18 and the second clamping rod 19 are both arranged on one moving rod 13 far away from the operating platform 4, the first clamping rod 18 and the second clamping rod 19 are respectively positioned at two ends of the moving rod 13, the first clamping rod 18 and the second clamping rod 19 are respectively arranged corresponding to the first bayonet and the second bayonet, the first clamping rod 18 extends into the first bayonet to abut against the inner wall of the feeding pipe 17, and the second clamping rod 19 is positioned at the bayonet of the second bayonet;

in the initial state, the first clamping rod 18 is clamped in the first bayonet, the second clamping rod 19 is separated from the second bayonet, the aluminum block is placed in the feeding pipe 17 at the moment, the aluminum block can fall on the first clamping rod 18, when the moving rod 13 moves, the moving rod 13 drives the first clamping rod 18 to move out of the first bayonet, meanwhile, the moving rod 13 drives the second clamping rod 19 to move into the second bayonet, the distance between the first clamping rod 18 and the second clamping rod 19 is the thickness of the aluminum block, so that one aluminum block between the first clamping rod 18 and the second clamping rod 19 falls to the bottom of the feeding pipe 17, and meanwhile, the second clamping rod 19 blocks the aluminum block above to prevent the aluminum block from falling.

In order to enable the first clamping rod 18 and the second clamping rod 19 to be clamped into the feeding pipe 17 better, chamfers are arranged on the first clamping rod 18 and the second clamping rod 19.

In order to allow the first catch lever 18 to move completely out of the feed pipe 17, the first catch lever 18 is moved over a distance greater than the diameter of the feed pipe 17.

In order to avoid collision between the second clamping bar 19 and the feeding pipe 17, the length of the second clamping bar 19 is not greater than the diameter of the feeding pipe 17.

As shown in fig. 5, the pushing-out assembly includes two baffles 21 and two wedges 20, the two wedges 20 are disposed on a moving rod 13 near the operating platform 4, the two baffles 21 are disposed on two sides of the cylindrical groove, the wedges 20 are disposed between the two baffles 21, a discharge port is disposed at the bottom of the feeding pipe 17, and the wedges 20 are disposed at the discharge port.

When the half gear 11 rotates for half a circle, the distance for driving the second rack 12 engaged with the half gear is equal to the diameter of the feeding pipe 17, so that the second clamping rod 19 just moves into the feeding pipe 17, the first clamping rod 18 just moves out of the feeding pipe 17, the aluminum block falls on the bottom of the feeding pipe 17, as the half gear 11 continues to rotate, the half gear 11 will be engaged with the other second rack 12, at the same time, the half gear 11 drives the other second rack 12 to move, so that the moving rod 13 connected with the other second rack 12 moves, so that the wedge block 20 moves, the inclined surface of the wedge block 20 abuts against the aluminum block, as the distance between the wedge block 20 and the baffle plate 21 becomes smaller, the wedge block 20 will drive the aluminum block to move, so that the aluminum block is pushed into the column-shaped groove, at the moment, the stamping head 6 has not moved into the column-shaped groove, so that the aluminum block already falls into the column-shaped groove when the stamping head 6 moves into the column-shaped groove, and extrusion forming is realized.

After extrusion, the cylinder 5 runs in the reverse direction, the stamping head 6 moves out of the cylindrical groove, the extrusion forming space can move out of the cylindrical groove along with the stamping head 6, along with the continuous movement of the stamping head 6, a workpiece can be in contact with the lantern ring 22, so that the lantern ring 22 drives the workpiece to move out of the stamping head 6, the push rod 23 is tightly attached to the stamping head 6 under the action of the torsion spring, during extrusion forming of the workpiece, the workpiece can push the push rod 23 outwards, so that the workpiece is formed between the roller 24 and the stamping head 6, when the workpiece is separated from the stamping head 6, the workpiece cannot be blocked by the stamping head 6, the push rod 23 can push the workpiece to move under the restoring force action of the torsion spring, so that the workpiece falls on one side of the cylindrical groove, and the formed workpiece.

At the same time, the air rod moves reversely, so that the first rack 8 moves reversely, the rotating gear 10 rotates reversely, the rotating shaft 9 rotates reversely, the half gear 11 rotates reversely, and the half gear 11 drives the moving rod 13 connected with the wedge 20 to move, so that the wedge 20 returns to the initial position.

In order to remove the formed workpiece, a collar 22 is arranged on the punching head 6, the collar 22 is fixed on the operating platform 4, and the collar 22 is connected with the punching head 6 in a sliding manner.

In order to push out a formed workpiece, a push rod 23 is arranged on the lantern ring 22, one end of the push rod 23 is hinged to the lantern ring 22, the other end of the push rod 23 abuts against the stamping head 6, and a torsion spring is arranged at the hinged position of the push rod 23 and the lantern ring 22.

In order to reduce friction, the abutment of the pusher 23 with the punch head 6 is provided with rollers 24.

For better ejection of the formed workpiece, the punch head 6 is coated with a lubricating oil.

The device drives the drive assembly to operate through the operation of the cylinder 5, the drive assembly drives the mobile unit to move, the movement of the mobile unit is limited through the positioning unit, the mobile unit drives the limiting unit to move, so that the aluminum block sequentially drops at the bottom of the feeding pipe 17, the aluminum block which drops is pushed into the cylindrical groove through the pushing-out assembly, then the extrusion forming of the aluminum block in the cylindrical groove is realized through the cylinder 5 driving the punching head 6, the manual feeding is avoided, the safety of an operator is protected, the automatic pushing and pipe recycling are realized, the manpower is saved, and the working efficiency is improved.

Compared with the prior art, this automatic extrusion device of aluminum pipe, realize autoloading through feeding mechanism, realize extrusion through the 6 aluminium pig to the cylindrical inslot of cylinder 5 drive punching press head, compare with current extrusion device, the device has realized the pay-off simultaneously through an output source, the shaping and the off-the-shelf recovery of work piece, the energy has been saved, compare with current feeding mechanism, this feeding mechanism is through mutually supporting of first kelly 18 and second kelly 19, realize dropping in proper order and the propelling movement of aluminium pig, avoid the aluminium pig card in pan feeding pipe 17 department, realize better pay-off effect.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. The automatic extrusion forming device for the aluminum pipe is characterized by comprising a base (1), a supporting rod (2), a cross rod (3), an operating platform (4), an air cylinder (5), a stamping head (6) and a feeding mechanism, wherein the cross rod (3) is arranged above the base (1) through the supporting rod (2), the operating platform (4) is arranged on the base (1), a cylindrical groove is formed in the operating platform (4), the air cylinder (5) is vertically arranged on the cross rod (3) downwards, the stamping head (6) is arranged on the air cylinder (5), the stamping head (6) is cylindrical, the stamping head (6) and the cylindrical groove are coaxially arranged, the feeding mechanism is arranged on one side of the operating platform (4), and the feeding mechanism comprises a driving assembly, a driven assembly, a limiting assembly and a pushing assembly;

the driving assembly comprises a connecting rod (7), a first rack (8), a rotating shaft (9) and a rotating gear (10), the connecting rod (7) is arranged on a gas rod of the cylinder (5), the first rack (8) is arranged on one side of the stamping head (6), the first rack (8) is parallel to the gas rod of the cylinder (5), the rotating shaft (9) is arranged above the operating platform (4), the rotating gear (10) is sleeved on the rotating shaft (9), the rotating gear (10) is in key connection with the rotating shaft (9), and the rotating gear (10) is meshed with the first rack (8);

the driven assembly comprises a moving unit and positioning units, the moving unit comprises a half gear (11), a second rack (12) and moving rods (13), the half gear (11) is sleeved on a rotating shaft (9), the half gear (11) is connected with the rotating shaft (9) in a key mode, the moving rods (13) are two, the two moving rods (13) are respectively arranged on two sides of the half gear (11), the second rack (12) is two, the two second racks (12) are respectively arranged on the two moving rods (13), the half gear (11) is meshed with one of the second racks (12), the positioning units are two, the two positioning units are correspondingly arranged with the two moving rods (13), each positioning unit comprises a positioning rod (14) and a spring (15), the positioning rod (14) penetrates through the moving rods (13), and a fixing rod (16) is arranged on the operating platform (4), the number of the fixed rods (16) is two, the two fixed rods (16) are respectively arranged at two ends of the movable rod (13), the spring (15) is sleeved on the fixed rod (14), one end of the spring (15) is connected with the fixed rods (16), and the other end of the spring (15) is connected with the movable rod (13);

the limiting assembly comprises a feeding pipe (17), a first clamping rod (18) and a second clamping rod (19), the feeding pipe (17) is arranged on the operating platform (4), the feeding pipe (17) is positioned between a column-shaped groove and the moving rod (13), the feeding pipe (17) is provided with a first bayonet and a second bayonet, the first bayonet and the second bayonet are respectively arranged at two sides of the feeding pipe (17), the first bayonet is positioned below the second bayonet, the first clamping rod (18) and the second clamping rod (19) are both arranged on the moving rod (13) far away from the operating platform (4), the first clamping rod (18) and the second clamping rod (19) are respectively positioned at two ends of the moving rod (13), the first clamping rod (18) and the second clamping rod (19) are respectively arranged corresponding to the first bayonet and the second bayonet, the first clamping rod (18) extends into the first bayonet and abuts against the inner wall of the feeding pipe (17), the second clamping rod (19) is positioned at the clamping opening of the second clamping opening;

the push-out assembly comprises wedge blocks (20) and baffle plates (21), the wedge blocks (20) are arranged on a moving rod (13) close to the operating platform (4), the baffle plates (21) are arranged on the operating platform (4), the two baffle plates (21) are provided, the two baffle plates (21) are respectively arranged on two sides of a cylindrical groove, the wedge blocks (20) are arranged between the two baffle plates (21), a discharge hole is formed in the bottom of the feeding pipe (17), and the wedge blocks (20) are arranged at the discharge hole.

2. The automatic extrusion forming device of the aluminum pipe as recited in claim 1, wherein a collar (22) is provided on the punch head (6), the collar (22) is fixed on the operation table (4), and the collar (22) is slidably connected with the punch head (6).

3. The automatic extrusion forming device of the aluminum pipe as recited in claim 1, wherein the collar (22) is provided with a push rod (23), one end of the push rod (23) is hinged with the collar (22), the other end of the push rod (23) is abutted against the stamping head (6), and a torsion spring is arranged at the hinged position of the push rod (23) and the collar (22).

4. The automatic extrusion molding apparatus for aluminum tubes as recited in claim 1, wherein a roller (24) is provided at a position where the push rod (23) abuts against the punch head (6).

5. The automatic extrusion molding apparatus for aluminum pipe as recited in claim 1, wherein the springs (15) are two in number, and the two springs (15) are respectively provided on both sides of the moving bar (13).

6. An automatic extrusion forming apparatus for aluminum pipes according to claim 5 wherein the diameter of the punch (6) is smaller than the diameter of the cylindrical groove.

7. The automatic extrusion molding apparatus for aluminum pipes as recited in claim 1, wherein the first seizing bar (18) and the second seizing bar (19) are each provided with a chamfer.

8. The automatic extrusion molding apparatus of aluminum pipe as recited in claim 1, wherein the first seizing bar (18) is moved by a distance larger than the diameter of the feed pipe (17).

9. The automatic extrusion molding apparatus for aluminum tubes as recited in claim 1, wherein the length of said second seizing bar (19) is not greater than the diameter of the feed pipe (17).

10. The automatic extrusion molding apparatus for aluminum pipes according to claim 1, wherein the punch (6) is coated with a lubricating oil.

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